Hi guys, in Exchange 2010 i need to create a new mail distribution group that must contain a internal member/email address and also "external email address". The question is: I need to create a Standard Distribution group ? I must to create a contact for every "external email" address in this distribution group so i can add a contact or i don't have to create it ? Thanks in advance.

Yes, you need contacts either with standard or dynamic for external users

Thanks you !

Yes, you need contacts either with standard or dynamic for external users